Question

РИО!!!!
1)CaO+H2O
2)CuSO4+Zn
3)Mg+HCl
4)Na2CO3+HCl
5)CuSO4+NaOH
6)Pb(NO3)2+KI
7)(NH4)2Cr2O7 => Cr2O3+Na2+H2O

Answer 1

3) Mg+2HCl=MgCl2+H2
4)Na2CO3+2HCl=2NaCl+ CO2+H2O
5)CuSO4+2NaOH=Na2SO4+Cu(OH)2
6)Pb(NO3)2+2KI=2KNO3 +PbI2